#!/usr/bin/env node

var pi= Math.PI;
module.exports =function (radius){
  function cir(){
    return pi*2*radius;
  }
  function area(){
    return pi*radius*radius;

  }
  return{
     area:area,
    cir:cir
  };
}
console.log('.\n03-export-function:\n',module);
